Slope Intercept Form:

slope intercept form=mx+b

Say you have two points, (5,-1) (6,9). To solve the m in the equation, you have to subtract y1 and y and x1 and x

9 - (-1)

10

10
6 - 5 = 1 The slope is 10 so y=10x+b Now we have to solve for b. To solve for b, plug in one of the points and solve.
5=10/6+b 10/6=60